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Finding the Fourth Proportional to 12,376.40, 17,080.64 and 7,071.64

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Solution

The fourth proportional to 12,376.40, 17,080.64 and 7,071.64 is: 9,759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,376.40 : 17,080.64 = 7,071.64 : x
  2. Step 2: Convert to fraction form
    12,376.40/17,080.64 = 7,071.64/x
  3. Step 3: Cross multiply
    12,376.40x = 17,080.64 × 7,071.64
  4. Step 4: Simplify right side
    12,376.40x = 120,788,137.05
  5. Step 5: Solve for x
    x = 120,788,137.05/12,376.40
  6. Step 6: Final answer
    x = 9,759.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.